CN106272907A - The method manufacturing die head body - Google Patents

The method manufacturing die head body Download PDF

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Publication number
CN106272907A
CN106272907A CN201610681702.XA CN201610681702A CN106272907A CN 106272907 A CN106272907 A CN 106272907A CN 201610681702 A CN201610681702 A CN 201610681702A CN 106272907 A CN106272907 A CN 106272907A
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CN
China
Prior art keywords
width
die head
pin
head body
slot width
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Granted
Application number
CN201610681702.XA
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Chinese (zh)
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CN106272907B (en
Inventor
T·W·布鲁
S·J·克雷默
C·J·马拉基
B·M·米勒
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Corning Inc
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Corning Inc
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Publication of CN106272907A publication Critical patent/CN106272907A/en
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Publication of CN106272907B publication Critical patent/CN106272907B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
    • B23P15/243—Honeycomb dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/26—Extrusion dies
    • B28B3/269—For multi-channeled structures, e.g. honeycomb structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/221—Extrusion presses; Dies therefor extrusion dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92952—Drive section, e.g. gearbox, motor or drive fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/404—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having non-intermeshing parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/757—Moulds, cores, dies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Abstract

There is provided and manufacture the method for die head body (113) being configured to extrude honeycomb ceramics, described method include the step (I) manufacturing die head body (113) and the upstream slot width (W1) that predetermines die head body (113) thus optimize upstream slot width (W1), section modulus that the most each die head pin (205) root (313) the includes step (II) within the scope of predetermined section modulus.Described method also includes step (III): predetermine slot length (L) so that pin pressure is within the scope of the pin pressure predetermined.

Description

The method manufacturing die head body
Present patent application be international application no be PCT//US2013/055940, international filing date is 2013 08 month 21 Day, enter the Application No. 201380050988.6 of National Phase in China, sending out of invention entitled " method manufacturing die head body " The divisional application of bright patent application.
CROSS-REFERENCE TO RELATED APPLICATIONS
The application requires in the U.S. Patent Application Serial 13/ that on August 28th, 2012 submits to according to 35U.S.C. § 120 The benefit of priority of 596,796, this paper is hereby incorporated by based on this application and by entire contents.
Field
The method that this patent disclosure relates generally to manufacture die head body, includes predetermining upstream slit it particularly relates to manufacture The method of the die head body of width and slot length.
Background technology
Known manufacture has the die head body of multiple charging aperture and pin array, this pin array be separate to limit discharge The honeycomb ceramics network of slit.Die head body can be installed to the part of extrusion die equipment, from pottery and/or form pottery with extrusion The green of the batch of material of the material of porcelain.Generally, subsequently green is processed into Honeycomb substrates, and can be used as particulate filter And/or catalytic carrier is for processing such as from the tail gas of Diesel engine.
Summary of the invention
In the first aspect, it is provided that manufacture the method being configured to extrude the die head body of honeycomb ceramics.Described method includes step (I): manufacture die head body, it includes multiple charging aperture and pin array, and this pin array separates to limit with charging aperture fluid even The honeycomb ceramics network of logical discharge slit.Each discharge slit is manufactured into has slot length L.Each discharge slit is also manufactured into and includes There is upstream slot width W1 the upstream portion being in fluid communication with at least one charging aperture, and there is downstream slot width W2 And the downstream part of the extrusion fluid communication with die head body.Manufacture the upstream portion of each discharge slit and downstream part thus W1 >W2.The method manufacturing die head body also comprises the steps (II): predetermines upstream slot width W1 thus optimizes upstream slit Width W1, the section modulus that the root of the most each die head pin includes is within the scope of predetermined optimization section modulus.Described side Method also includes step (III): predetermine slot length L so that pin stress the pin range of stress predetermined it In.
According to a kind of embodiment of first aspect, step (II) predetermines upstream slot width W1 thus maximizes upstream Slot width W1, the section modulus that the root of the most each die head pin includes is within the scope of predetermined maximization section modulus.
According to the another kind of embodiment of first aspect, the predetermined optimization section modulus scope of step (II) includes following model Enclose: from about 9.3X10-6cm3To about 2.8X10-5cm3。
Always according to the another kind of embodiment of first aspect, the predetermined pin range of stress of step (III) includes following model Enclose: from about 240MPa to about 750MPa.
Always according to the another kind of embodiment of first aspect, the pin range of stress predetermined of step (III) is based on ginseng The pin stress that ratio die head body calculates, this reference die head body includes reference slit, overall along reference slit of this reference slit Length has the reference slot width of the substantial constant being substantially equal to W2.
According to the another kind of embodiment of first aspect, the pin range of stress predetermined of step (III) is based on experience The pin stress of the calculating of the die head body of cleaning determines.
According to the another kind of embodiment of first aspect, wherein step (I) includes die head system is caused single piece one-piece moule Head body.
According to the another kind of embodiment of first aspect, wherein step (I) includes manufacturing the die head body with L≤about 2.5mm.
According to the another kind of embodiment of first aspect, wherein step (I) includes manufacturing the die head with W2≤about 255 μm Body.
According to the another kind of embodiment of first aspect, step (I) factory length is the upstream portion of the slit of L1, Yi Jichang Degree is the downstream part of the slit of L2, wherein L >=about L1+L2.
According to the another kind of embodiment of first aspect, step (I) manufactures each discharge slit, and it is included in the upper of discharge slit Trip part and downstream part between transition region, transition region includes transitional surface, its with angle [alpha] from the upstream portion of discharge slit Surface extend to the surface of downstream part, wherein 45 °≤α≤60 °.
According to the another kind of embodiment of first aspect, step (I) manufactures at least one pin of pin array, and depression (divot) within being positioned at the downstream part of discharge slit.
Any embodiment of first aspect as above can individually implement or with its of first aspect as above Remaining embodiment combination is implemented.
According to second aspect, it is provided that manufacture the method being configured to extrude the die head body of honeycomb ceramics.Described method includes step (I): manufacture die head body, it includes multiple charging aperture and pin array, and this pin array separates to limit with charging aperture fluid even The honeycomb ceramics network of logical discharge slit.Each discharge slit is manufactured into has slot length L.Each discharge slit is also manufactured into and includes There is upstream slot width W1 the upstream portion being in fluid communication with at least one charging aperture, and there is downstream slot width W2 And the downstream part of the extrusion fluid communication with die head body.Manufacture the upstream portion of each discharge slit and downstream part thus W1 >W2.Described method also includes that step (II) predetermines upstream slot width W1, makes the cross section that each die head pin root includes Modulus is at about 9.3X10-6cm3To about 2.8X10-5cm3Predetermined section modulus within the scope of.Described method also includes step (III): predetermine slot length L thus pin stress is within the predetermined pin range of stress, this predetermined pin stress The pin stress that scope calculates based on reference die head body, this reference die head body includes reference slit, and this reference slit is along reference The overall length of slit has the reference slot width of the substantial constant being substantially equal to W2.
Always according to the another kind of embodiment of second aspect, the predetermined pin pressure scope of step (III) includes following model Enclose: from about 240MPa to about 750MPa.
According to the another kind of embodiment of second aspect, step (II) predetermines upstream slot width W1 thus in maximization Trip slot width W1, and the section modulus that the root of each die head pin includes is within the scope of predetermined section modulus.
According to the another kind of embodiment of second aspect, step (I) includes die head system causes single piece single-piece die head body.
Any embodiment of second aspect as above can individually implement or with its of second aspect as above Remaining embodiment combination is implemented.
According to the third aspect, it is provided that manufacture the method being configured to extrude the die head body of honeycomb ceramics.Described method includes step (I): manufacture die head body, it includes multiple charging aperture and pin array, and this pin array separates to limit with charging aperture fluid even The honeycomb ceramics network of logical discharge slit.Each discharge slit is manufactured into has slot length L.Each discharge slit is also manufactured into and includes There is upstream slot width W1 the upstream portion being in fluid communication with at least one charging aperture, and there is downstream slot width W2 And the downstream part of the extrusion fluid communication with die head body.Manufacture the upstream portion of each discharge slit and downstream part thus W1 >W2.Described method also includes that step (II) predetermines upstream slot width W1, makes the cross section that each die head pin root includes Modulus is at about 9.3X10-6cm3To about 2.8X10-5cm3Predetermined section modulus within the scope of.Described method also includes step (III): predetermine slot length L so that pin stress is within the predetermined pin range of stress, this predetermined pin should The pin stress of power scope calculating based on the die head body being cleaned step determines.
According to a kind of embodiment of the third aspect, the predetermined pin pressure scope of step (III) includes following ranges: from About 240MPa to about 750MPa.
According to the another kind of embodiment of the third aspect, step (II) predetermines upstream slot width W1 thus in maximization Trip slot width W1, and the section modulus that the root of each die head pin includes is within the scope of predetermined section modulus.
According to the another kind of embodiment of the third aspect, step (I) includes die head system causes single piece single-piece die head body.
Any embodiment of the third aspect as above can individually implement or with its of the third aspect as above Remaining embodiment combination is implemented.
Brief Description Of Drawings
Read the described in detail below of the present invention referring to the drawings, the above-mentioned each feature of the present invention, side be may be better understood Face and advantage and other feature, aspect and advantage, wherein:
Fig. 1 is the schematic diagram of the extrusion equipment according to each side of the present invention；
Fig. 2 schematically shows the die head body portion according to the extrusion equipment shown in Fig. 1 of the exemplary aspect of the present invention Enlarged partial cross-sectional perspective view；
Fig. 3 is the enlarged partial cross-sectional perspective view of the die head body shown in Fig. 2；
Fig. 4 is the enlarged partial cross-sectional view of the die head body of the another kind of example according to the present invention；With
Fig. 5 is flow chart, it is shown that manufacture the exemplary step being configured to extrude the method for honeycomb die body.
Describe in detail
It is described more fully below the present invention at this with reference to the accompanying drawings, accompanying drawing gives the exemplary embodiment party of the present invention Formula.Whenever possible, use identical reference to represent same or similar part in all of the figs.But, The present invention asking protection can implement in a number of different ways, should not be interpreted to be defined in the embodiment herein proposed. These exemplary embodiments make to illustrate thorough and complete, it is possible to fully show required guarantor to those skilled in the art The scope of the present invention protected.
Fig. 1 provides the extrusion equipment 101 for processing batch material.Can provide and include pottery or form ceramic material Various batch material.Extrusion equipment 101 can extrude the green with difformity and size.In one embodiment, extrusion sets Standby 101 can be used for extruding honeycomb ceramics, and it can be fired into honeycomb ceramic body subsequently.Honeycomb ceramic body can be processed further subsequently, make For a part for filter, it is used for processing the tail gas stream of electromotor.Such as, honeycomb ceramic body can provide for diesel oil or other The particulate filter of motivation type.
Extrusion equipment 101 can include cylinder 103, is wherein provided with one or more screw rod 105.In a kind of exemplary enforcement In mode, can forming cylinder 103 to provide one or more chambers 107, it each accommodates screw rod 105, and this screw rod 105 is at cylinder The middle body of 103 is rotatably installed in chamber 107.Such as, screw rod 105 can be with one or more driving means 109 (electricity Machine) power is provided.At the second downstream end 111 of extrusion equipment 101, the die head body 113 schematically shown is installed to Cylinder 103.Die head body 113 is configured to batch material is extruded into required form such as, honeycomb ceramics.At close upstream end thereof 115, Feed inlet 117 can be provided to allow the batch material from feeder 119 to enter chamber 107.Also as it can be seen, extrusion equipment 101 can include control system 121.Control system 121 be configured to driving means 109 adjusting screw rod 105 rotation and/or The feed rate of the batch material that regulation is introduced by feeder 119.
During operation, batch material can introduce feed inlet 117, as indicated by arrows 123 by feeder 119.Such as arrow Shown in 125a, batch material can enter cylinder 103 subsequently and the rotation by screw rod 105 is pushed ahead, such as 125b, shown in 125c, Thus batch of material can contact and enters die head body 113 at 125d subsequently.In any time that batch of material is flowed by extrusion equipment 101, The charging of scalable batch of material enters the speed (that is, feed rate) of feed inlet 117 and/or speed (that is, the rotation of screw rod 105 rotation Rotational speed rate or screw speed).
Fig. 2 shows the optional aspect of a kind of example die head body 113 of the example extrusion equipment 101 of Fig. 1.Die head body 113 Can include single piece single-piece die head body 113, it includes multiple charging aperture 201a, 201b and die head pin 205 array, this pin battle array Row 205 are formed integrally together and separate to limit the honeycomb ceramics network 207 of discharge slit 209.As shown in the figure, all discharges are narrow Groove 209 can directly be in fluid communication with at least one charging aperture.Such as, as shown in Figure 2, a row charging aperture 201a can offset from each other (offset), and each charging aperture 201a have along slit cross point 202 extend axis.Other row may also include charging aperture They offset from each other (offset) 201b similarly, and each charging aperture 201b has the axis extended along slit cross point 204.
Fig. 3 shows the exemplary characteristics of example die head body 113.Overall slot length L (is also referred to as that " slit is long in the text Degree L ") can with die head body 113 extrusion face 301 fluid communication downstream end 302 and with at least one charging aperture 201a Limit between fluid communication upstream end thereof 303.As shown in the figure, each discharge slit 209 can include the upstream portion containing upstream end thereof 303 Divide 305 and contain the downstream part 307 of downstream end 302.Upstream portion 305 is in fluid communication with downstream part 307, and upstream portion Divide 305 upstreams being located substantially entirely in downstream part 307.
Overall slot length L can at least include that upstream length L1 of the upstream portion 305 of discharge slit 209 is narrow plus discharge Downstream length L2 of the downstream part 307 of groove 209.So, overall length L can be greater than or equal to about L1+L2.
Each discharge slit 209 may also include optional transition region 309, its discharge slit 209 upstream portion 305 and under Between trip part 307.Transition region 309 (provided that) transitional surface 311 can be included, it is with upper from discharge slit 209 of angle [alpha] The surface 314 of trip part 305 extends to the surface 315 of downstream part 307.In certain embodiments, 45 °≤α≤60 °, but Other embodiments can use other transition angle.Transition length L3 can be significantly less than L1 or L2.In these embodiments, totally Length L still can be greater than or equal to about L1+L2.In the embodiment shown, transition length L3 is considered as the one of upstream length L1 Part, wherein overall length L approximates L1+L2.When transition length is bigger, transition length L3 can be separated with upstream length L1 Considering, wherein overall length L can be greater than or equal to about L1+L2+L3.
Upstream portion 305 can include upstream breadth W1, and it is more than the downstream width of the downstream part 307 of discharge slit 209 W2.So, the most as shown in Figure 3, W1 can be more than W2 (that is, W1 > W2).
As described below, upstream breadth W1 (in one embodiment, even maximize), the most each die head pin 205 can be optimized The section modulus that includes of root 313 within the scope of predetermined section modulus.Upstream breadth W1 can be in following ranges: from about 0.2mm is to about 0.5mm, such as from about 0.3mm to about 0.4mm, but can use other upstream breadth in other embodiments.
In using, the optional trip width W2 that fixs limits the hole wall that intersects of Honeycomb substrates from die head body 113 extrusion Final thickness.Such as, downstream width W2 can be in following ranges: from about 0.04mm to about 0.20mm, such as from about 0.05mm to about 0.15mm, such as from about 0.06mm to about 0.14mm, but can provide other downstream width in other embodiments.
In other embodiments, upstream length L1 can be relevant to upstream breadth W1.Such as, in certain embodiments, upstream Length L1 can be greater than or equal to about 5 W1.Similarly, downstream length L2 can be relevant to downstream width W2.Such as, downstream length L2 Can be greater than or equal to about 7 W2 greater than or equal to about 5 W2.
In certain embodiments, overall length L may be less than or equal to about 3mm such as from about 1mm to about 2.6mm, such as from About 2mm is to about 2.6mm, but can use other length in other embodiments.In certain embodiments upstream length L1 can be from About 1mm is to about 2mm, such as from about 1.4mm to about 1.7mm, but can use various length in other embodiments.Implement at other In example, downstream length L2 be smaller than about 1.5mm such as from about 0.4mm to about 1mm, various length can be used in other embodiments Degree.
In certain embodiments, upstream breadth W1 be smaller than about 0.5mm such as from about 0.2mm to about 0.5mm, such as from about 0.3mm is to about 0.45mm, such as from about 0.3mm to about 0.4mm, but can be used in other embodiments by other upstream breadth.? In other embodiments, downstream width W2 is smaller than 0.3mm, for example, less than about 0.2mm, such as from about 0.06mm to about 0.14mm, But other length can be used in other embodiments.
Fig. 4 shows another example die head body 401, and it includes at least one depression 403, and it can provide around at least One pin 405.As shown in the figure, depression 403 (provided that), within can be located at the downstream part 407 of discharge slit 409.Row Material slit 409 may also include upstream portion 411, and its width W1 is more than the width W2 of downstream part 407.Also as it can be seen, can only Thering is provided discharge slit 409, wherein, the discharge slit of selected number has a different in width, and remaining discharge slit one or more 413 are caving in 403 (provided that the length beyond) has substantially the same width along discharge slit.In this design In, the relevant manufacturing cost of single-width part can be realized and reduce, the upstream with amplification of enough numbers is still provided simultaneously Width W2 is to reduce slit stress and to improve the slit that batch of material is sprawled.
Referring now to the die head body shown in Fig. 3, the method preparing die head body is described, it should be understood that can example as implementation of class As identical method prepares the die head body shown in Fig. 4, or other die head body according to aspects of the present invention.The side of the present invention Method can manufacture die head body 113, and it includes multiple charging aperture 201a, 201b and die head pin 205 array, this pin array separate with Limiting the honeycomb ceramics network 207 of discharge slit 209, itself and charging aperture 201a, 201b hole is in fluid communication.Each discharge slit 209 is made Cause and there is slot length L.Each discharge slit 209 is also manufactured into has upstream portion 305, and it includes upstream slot width W1 also It is in fluid communication with at least one charging aperture 201a, 201b.Each discharge slit 209 is also manufactured into has downstream part 307, and it includes Downstream slot width W2 the fluid communication in the extrusion face 301 with die head body 113.As mentioned above, it is necessary, manufacture the upper of each discharge slit Trip part 305 and downstream part 307, thus W1 > W2.
The method of manufacture die head body also comprises the steps: to predetermine upstream slot width W1 thus optimizes upstream slit Width W1, and the section modulus that the root 313 of each die head pin includes is within the scope of predetermined section modulus.Optimize upstream narrow Well width W1 can provide sufficiently large section modulus, with provide reduce back pressure and enhancing flow performance simultaneously as increase Section modulus and the intensity of enhancing is provided.In one embodiment, it is desirable that though not in all embodiments, optimizes upstream narrow Well width W1 maximizing slot width W1.Maximize upstream slot width W1 and can beneficially maximize lateral expansion and maximization Ground reduces batch material and sprawls back pressure when entering discharge slit 209 in expansion area.Batch material discharge slit network it Interior fully sprawls the stress that can reduce batch material, allows the honeycomb ceramics base from the extrusion face 301 of die head body 113 extrusion simultaneously The wall of material carries out required joint.But, although increase slot width W1 and can may advantageously facilitate sprawling and reducing of batch material The stress of batch material, but be there is the die head body of wide upstream slot width W1 by manufacture, the knot of die head pin can be damaged Really globality.It practice, increase upstream slot width W1 generally reduce the section modulus at die head pin 205 root 313.This Sample, manufactures upstream slot width W1 and is maintained at predetermined by the section modulus of die head pin 205 root 313 with maximized size simultaneously Section modulus within the scope of, can be useful.In other embodiments, it may be necessary to optimize slot width W1, without Maximize slot width, to provide further intensity for die head pin, also provide for increasing upstream slot width W1 size simultaneously Benefit.In one embodiment, can optimize and such as maximize upstream slot width W1, and make die head pin 205 root 313 include Section modulus from about 9.3X10-6cm3To about 2.8X10-5cm3Within the scope of section modulus.Die head pin root is maintained at Within the scope of section modulus as above, the result integrity of die head body can be kept in every operating condition.Additionally, often Periodically perform cleaning, clean the batch material of die head body.Generally, this cleaning can make die head pin suffer The big power applied by Pressurized cleaning fluid in cleaning.Die head pin 205 root 313 is maintained at as above Within the scope of section modulus, it is possible to provide have sufficiently rigid die head pin, it can resist bending force, otherwise may cause die head Pin lost efficacy at root 313.
Manufacture die head body method may further include the steps of: predetermine discharge slit overall length L thus pin should Power is within the predetermined pin range of stress.Overall slot length L keeping sufficiently large be conducive to the wall of Honeycomb substrates from It is sufficiently engaged with before extrusion face 301 extrusion of die head body 113.But, increase overall slot length L and can adversely increase honeycomb ceramics The operational stresses induced of extrusion equipment, also can increase predetermined pin stress；Thus cause potential die head pin structural failure and Increase running cost.So, exemplary method can predetermine overall length L of discharge slit, minimizes length L with by pin Within pressure is reduced to the predetermined pin range of stress, still provide sufficiently long overall length L to allow honeycomb ceramics base simultaneously The wall of material suitably engages (knitting).
In one embodiment, the predetermined pin range of stress can be from about 240MPa to about 750MPa.In other embodiments In, the pin stress that the predetermined pin range of stress can calculate based on reference die head body, this reference die head body includes reference slit, This reference slit has the reference slot width of the substantial constant being substantially equal to W2 along the overall length of reference slit.Example As, existing die head body can include the width of substantial constant along substantially all slot length.In such an embodiment, can be Analyze existing die head body under the slot width of downstream slot width W2 being substantially equal to downstream slotted portion 307, determine Pin stress in some operation or cleaning.Then, this pin stress can be used as the predetermined pin range of stress Maximize overall length L of discharge slit 209 in die head body 113.So, the overall length of discharge slit 209 can be minimized L, keeps the pin stress being similar to used by existing die head body simultaneously, and this existing die head body can have the slit width of substantial constant Degree.
In other embodiments, the predetermined range of stress can determine based on following: is cleaned the die head body of step The pin stress calculated.Such as, to having the existing design setting model of acceptable pin designs, thus can calculate and be cleaned step The pin stress of rapid die head body.Subsequently, this predetermined stress can be used to assist in the discharge slit that can obtain Long length L, within can being maintained at the predetermined pin range of stress simultaneously by pin stress.
Fig. 5 shows the exemplary step preparing die head body.Described method can include step 501: predetermines as mentioned above Upstream slot width W1.Specifically, predetermine upstream slot width W1 and optimize such as maximization thus upstream slot width W1, the section modulus simultaneously included by the root of each die head pin is within the scope of predetermined section modulus, such as from about 9.3X10-6cm3To about 2.8X10-5cm3, but other scope can be used in other embodiments.
Described method the most optionally carries out step 503: obtain based on the pin stress calculated predetermine should Power scope.In the first embodiment, the step predetermining the pin range of stress can be answered based on the pin that reference die head body calculates Power, this reference die head body includes reference slit, and this reference slit has along the overall length of reference slit and is substantially equal to W2 The reference slot width of substantial constant.In a second embodiment, as first embodiment additionally or alternatively, based on die head The pin stress calculated when body is cleaned step is to determine the predetermined range of stress.
It follows that described method can proceed to step 505: predetermine slot length L so that pin stress is in advance Within the pin range of stress determined.In certain embodiments, the predetermined range of stress is from about 240MPa to about 750MPa.? In other embodiments, described method can directly proceed to predetermine narrow from the step 501 predetermining upstream slot width W1 The step 505 of slot length L.In other embodiments, the most not figure 5 illustrates, described method can originate in step 505 and with After carry out taking office the step 503 of choosing or being directly to step 501.In either case, upstream slit has once been predetermined Width W1 and slot length L, in step 507, upstream slot width W1 and slot length L, together with other die head body parameter Can be used for manufacturing die head body.
Various manufacturing technology can be used to manufacture die head body, including line cutting EDM, insert milling EDM or grinding and cutting operation. Can manufacture die head body, it includes multiple charging aperture 201a, 201b and die head pin 205 array, and this pin array separates to limit The honeycomb ceramics network 207 of discharge slit 209, itself and charging aperture 201a, 201b hole is in fluid communication.Each discharge slit is manufactured into be had Predetermined slot length L.Each discharge slit be also manufactured into include having upstream slot width W1 and with at least one charging aperture The upstream portion 305 of 201a, 201b fluid communication, and there is downstream slot width W2 the extrusion face 301 with die head body 113 The downstream part 307 of fluid communication.Manufacture upstream portion 305 and downstream part 307 thus W1 > W2.
The exemplary method preparing die head body is described referring now to table below.
Table 1
For each sample, die head body parameter can be simulated to measure root 313 section modulus of die head pin 205 and to add Work-cleaning pin stress % surrender.Such as, first, it is as shown in the table, can optimize upstream slot width W1 (from about 0.3mm to about 0.4mm), make the section modulus (what it is as shown in the table) that the root of die head pin includes within the scope of predetermined section modulus simultaneously Such as, (from about 9.3X10-6cm3To about 2.8X10-5cm3).It follows that can minimize slot length L (such as, from about 2.2mm to About 2.6mm), the wall providing enough engages within pin pressure is reduced to the predetermined pin range of stress simultaneously and (such as, exists Within the predetermined pin range of stress relevant from about 28 to about 81 to processing-cleaning pin stress % surrender).
The aspect of the present invention can provide the bond strength of the hole wall of the base material of enhancing, and it can prevent from being subsequently dried and burning Rupture during system.Additionally, relatively thin hole wall can be obtained by the downstream slotted portion with less downstream width, and will not Operational stresses induced in the slot area of die head body is increased to the highest level.It practice, can realize than normal pressure reduce from About 10% to the stress more than 30%, to obtain higher throughput capacity；Thus reduce manufacturing cost.
By increasing upstream slot width W1 relative to downstream slot width W2, sprawling of batch of material can be more precisely controlled With sprawl angle, with the intersection region intersection of 202 or 204 (that is, see in Fig. 2 be not marked with) that guarantees not feed, having can The intensity comparable with the zone of intersection (see 202,204) of charging.Allow to reduce row additionally, so increase upstream slot width (W1) Overall length L of material slit 209, thus improves and manufactures motility and accelerate to manufacture the manufacture of die head body 113.Discharge slit 209 The reduction of length L and the increase of its width, significantly reduce in this hole of expansion area E (see Fig. 3)/slit intersects with And the pressure drop of overall slot area.Additionally, shown by the fluid flow model of actual test run confirmation, wider slit The flowing motility that may introduce slit can be weakened in region.In some cases, the model table confirmed by actual test run The flow rate difference of bright 50% is lowered to less than 5%.Such design is not limited to one and expands and constriction zone.Phase Instead, any number of expansion/constriction zone can be placed in die design, optimize above-mentioned die design parameter and (engage strong Degree (knit strength), pressure drop and/or flow uniformity).Batch material flow can be passed through the equal of die head by the aspect of the present invention Even property improves 10 times, and this greatly reduces processes/materials change and the impact of die head tolerance variation.
It will be apparent to those skilled in the art that can be in the spirit and scope without departing from the theme requiring patent right In the case of, embodiment as herein described is carried out various modifications and changes.Therefore, it is intended that present embodiment Including the modifications and variations of the present invention, premise is that these modifications and variations fall in appended claim and their equivalents In the range of.

Claims (14)

1. a honeycomb extrusion die, it comprises:
Die head body, described die head body comprises pin array, and described pin array separates thus the outer surface of described pin limits The honeycomb ceramics network of discharge slit, provides multiple charging apertures, wherein said discharge slit and described charging aperture for described die head body Fluid communication, the outer surface of a pair adjacent pin of at least a part of which limits discharge slit, described discharge slit bag between which Containing the upstream slot width part with width W1 adjacent with at least one in described charging aperture, at described upstream slit width That spends portion downstream has the downstream slot width part of width W2, the female with the width more than W2 and far-end Slot width part, described far-end slot width part has the width less than described female width.
2. honeycomb extrusion die as claimed in claim 1, it is characterised in that described far-end slot width part has width W2。
3. honeycomb extrusion die as claimed in claim 1, it is characterised in that described far-end slot width part have except Width beyond W2.
4. honeycomb extrusion die as claimed in claim 1, it is characterised in that in addition at described female, edge The length of described discharge slit, at least some in described discharge slit has substantially the same width.
5. honeycomb extrusion die as claimed in claim 1, it is characterised in that described far-end slot width part extend to The end surface of at least one in few a pair adjacent pin.
6. honeycomb extrusion die as claimed in claim 5, it is characterised in that described female and described end surface phase Away from certain depth.
7. honeycomb extrusion die as claimed in claim 1, it is characterised in that the width W1 of described upstream slot width part More narrower than the width of adjacent charging aperture.
8. a honeycomb extrusion die equipment, it comprises:
Die head body, described die head body comprises pin array, and described pin array separates thus the outer surface of described pin limits The honeycomb ceramics network of discharge slit, provides multiple charging apertures, wherein said discharge slit and described charging aperture for described die head body Fluid communication, the outer surface of a pair adjacent pin of at least a part of which limits discharge slit, described discharge slit bag between which Containing the upstream slot width part with width W1 adjacent with at least one in described charging aperture, at described upstream slit width That spends portion downstream has the downstream slot width part of width W2, the female with the width more than W2 and far-end Slot width part, described far-end slot width part has the width less than described female width.
9. honeycomb extrusion die equipment as claimed in claim 8, it is characterised in that described far-end slot width part has Width W2.
10. honeycomb extrusion die equipment as claimed in claim 8, it is characterised in that described far-end slot width part has There is the width in addition to W2.
11. honeycomb extrusion die equipment as claimed in claim 8, it is characterised in that except at described female with Outward, along the length of described discharge slit, at least some in described discharge slit has substantially the same width.
12. honeycomb extrusion die equipment as claimed in claim 8, it is characterised in that described far-end slot width part is prolonged Reach the end surface of at least one at least one pair of adjacent pin.
13. honeycomb extrusion die equipment as claimed in claim 12, it is characterised in that described female and described end Surface is at a distance of certain depth.
14. honeycomb extrusion die equipment as claimed in claim 8, it is characterised in that described upstream slot width part Width W1 is more narrower than the width of adjacent charging aperture.
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